Rotary disk valve for gas-engines.



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f) fewer? I //UWi k/ W T. ARMSTRONG. HGr/WY DISK` VALVE Fam GAS ENGINES.

' APFLICRTIN FILED HOV. 8,-9l8. 1,225,916.

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www@ May 15, 1917.

EDWIN T. ARMSTRONG, 0F ADRIAN, MICHIGAN'.`

ROTARY DISK ALVE FOR GAS-ENGINES.

Speclcation of Letters Patent. Patented May 15, 191'?,

y Application led November 8, 1916. Serial No. 130,288.

To all whom t may concern.'

Be it known that I, EDWIN T. ARM- STRONG, a citizen of the UnitedStates, residing at Adrian, in the county of Lenawee and State ofMichigan, have invented a new and useful Rotary Disk Valve' forGras-Engines, of which the following is a specification.

This invention relates to new and useful improvements in rotary diskvalves for in- ,ternal combustion engines.

The principal object of the invention'is to produce a simply constructednoiseless valve which'may be operatedA Without the use of springscreams, to take the place of the usual puppet or sleeve valves.

A seconda-ry object is to produce a valve, the operation of which willbe mechanicallyy positive at all times and will not be affected by thedeposits of carbon. l

Still another object is to provide a valve which, while having large gaspassageways,

`'will be so constructed that it will be absolutely gastight except whenthe ports are opened.

With these and other objects in view the invention resides in the novelfeatures of construction, combination and arrangement of parts whichwill be hereinafter more particularly described and claimed, and shownin the drawings wherein:

Figure l represents a vertical transverse sectionthrough a portion of aninternal' combustion engine, certain parts of which,

including the top plate, are removed for the sake of illustration;

Fig. 2 is a bottom plan View of the uppermost valve disk;

Fig. 3 is a similar view of the ring which surrounds the rotary valvehead;

Fig. 4 is a top plan-view of thelowermost disk;

Fig. 5 is 'a similar view of the valve head;

and

Fig. 6 is a vertical sectional view through the several parts of theinvention.

In the preferred embodiment of my invention which is illustrated in theaccompanying drawings, wherein similar reference characters designatelike parts throughout the several views, it will be noted that the valveis in the casing C of the engine adjacent the inlet and outlet toandfrom the cylinder C in which the piston P reciprocates. Fig. l showsthe inlet 1 from the intake manifold and the outlet 2 leading to theexhaust manifold on the same side of the engine, these openingslcomrnunicat'mg with openings 3 and 4 respectively formed in a circularplate or valve disk 5 which is disposed in a seat in the upper end ofthe. engine casing directly over said openings 1 and 2. It will be notedthat `the lateral, walls 6 of each of the openings 3 and 4 are the partsof radii of the circle which forms the periphcr of the disk, and thatthe curved sides are parts of concentric circles whose center is the'center of the disk. f

Upon this disk 5 is placed a ring 8 whose .outer diameter is the same asthat of the disk 5` with which it contacts. A second disk 9 also beingof a diameter to closely fit the seat 5 rests upon the ring 8. The lastnamed disk i) also has a pair of openings v1() and 11 which aline withthe openings 3 and 4; the lateral walls`12 of these openings 10 and1.1-as well as the curved walls 13 are formed substantially as thecorresponding wallsG and 7 of the open, ings in the first mentioneddisk. A

In order that these openings 3 and 4 may be held in registration withthe o enings 1thy and 11 respectively, a plurality oiD 14 are formed inthe disks adjacent the -apertures l edges. said ring 8 also havingsimilar apertures. all oi' which are adapted to aline for the receptionof the machine bolts 15, the threaded ends of which are screwed into thecasing C. Before,however. the top disk 9 is screwed down upon the ring8, the valve head is placed in position therebetween, the latterconsisting of a circular disk-like plate 16 of a diameter substantiallythe same or slightly smaller than the inner diameter of the ring 8. andathickness approximately equal to that of said ring. The head 16 has avalve stem 17 fixed to its lower face and in its center. said stemextending through an opening 1S in the center of the lowermost disk 5.The head further has a single opening 19 formed therethrough, Saidopenving having walls QO which are parts of the radii of the peripheryof the disk` and whose curved walls are parts of concentric circles. thecenter of which is the center of the disk. Thus when the valve stem 17is caused to rotate, the valre head 16 will si multaneously rotatebetween the upper and of which mesh with the teeth on a second beveledgear (not shown) which is carried b v one face ot' the spur gear '22,the latter in turn being in mesh with a second spur gear 225. Both ofthese gears and :Z3 are of the saine diameter, the latter being disposedin engagement with a gear 2l whose diameter is substantially one-half ofthat of the other, this last mentioned gear Q4: being mounted on thecrank shaft S to rotate therewith. Through this train of gears themotion of the crank shaft is transmitted to the valve stem and thence tothe valve head and is suitably controlled through the various sizedgears to permit the openings in the valve head and valve disks toregister at the proper moments.l

As the piston P moves from its highest to its lowest point after anexplosion, the

valve head will be rotated to bring its opening in alinement with theopenings or ports 3 and l0 in the disks which are disposed above andbelow the same, thereby allowing the exhaust gases to be forced out intothe exhaust manifold by the next upstroke of said piston. The moment thepiston reaches its highest point the opening in the valve head will havemoved beyond the edges of the ports 3 and 11, and as the piston startsits nextdown stroke this opening 19 will commence to register with theports l and 11, thus permitting a charge of gas to ybe drawn into thecylinder C. Continued, movement of the crank shaft of the engirie causesthe valve head to rotate to move its opening out ol alinement with theotherV openings in the valve disks, the parts being so disposed daringthe compression and ex plosion of the gases, the latter event talkingplace when the opening 19 is midway between the ports in the valvedisks, To facili tate the rotation of the valve head and to prevent thesame from sticking, oil grooves 25 and 2G are formed in the upper andlower faces of the disks 5 and 9 respectively. These grooves extend fromthe peripheries of the disks to substantially the centers thereof, thuspermitting oil to be spread over both faces of the valve head andthoroughly lubricate the same. The upper face of the valve disk 9 isslightly convened as illustrated in Fig. 1 to prevent'the same fromwarping, and otherwise strengthen it to receive the force of theexplosion of the gases.

From the foregoing description, it will he seen that a. very simplyconstructed rotary valve has been produced which will take the place ofthe usual sleeve or puppet valves and will operate much moreefficiently.'

I claim: i

l. The combination with an engine having a seat therein; of a valvedisk. disposed in said seat and having a central aperture and a pair. ofopenings spaced outwardly from said aperture, a second valve .diskspaced from the first and having a pair of openings alined with thosetherein, a valve head comprising a flat circular plate disposed betweensaid disks and having a single opening adapted to register with eitherof the alined openings in the disks, a valve stem connected with thevalve head and extended through said central aperture into theicrankcase of said engine, a beveled gear carried by the inner end of saidstem, a spur gear, asccon'd beveled gear carried by said spur gear tomesh with the first beveled gear,

a second spur gear in mesh with the first mentioned spur gear, each ofsaid gears bcing of the same size, and a pinion carried by the crankshaft of said engine and meshing with the second spur gear, said pinionbeing one-half the size of said gear.

2. The combination with an engine having a seat therein; of a valve diskdisposed infgyid seat and comprising a flat circular said disk having acentral aperture an a ,pair of openings spaced outwardly from saidaperture, a second valvel disk also disposed in said seat and comprisinga circular plate having a pair of openings alined with the openings inthe first mentioned.

disk, the inner face of said plate being flat and its outer face convex,a ring of a diameter equal to the diameter of said disks and disposedtherebetween, fastening elements connecting said disk and ring to theengine, a valve head in the form of a fiat circular plate disposedwithin said ring, said head heilig of a diameter substantially equal tothe opening in said ring and of approximately the same thickness as saidring and having a. single opening therein, a valve stem extended throughsaid central aperture and connected to the valve ,head ccntrallythereof, and means for rotating said valve head to move its opening intoregistration with either of the openings in said disks. y

EDWIN T. ARMSTRONG.

